With regards Saint Sonnet, Nicholls has talked up the Marsh Novice Chase, but he's got a hurdles mark that they could exploit in a handicap, and he has a second entry in the Coral Cup which seems to have gone unnoticed (no other entries).
Also Nicholls has previous for this with Aux Ptits Soins who went to Coral Cup stepping up in trip out of France on a very lenient mark where improvement was expected.
Saint Sonnet is presumably thought as being a lot better than a 145 rated horse and similarly is expected to be better for a step up in trip. I've taken 33/1 nrnb for the Coral Cup just in case they switch targets and Nicholls is putting us away like he did with Aux Ptits Soins.
Let's face it, winning an egg and spoon race at Catterick is hardly a prep for a Marsh Novices Chase, but it does give him a racecourse gallop, and leaves his hurdles mark untouched. As I said nrnb for the coral Cup feels worthwhile having onside just in case.